Question: Which painting is the widest?
Paraphrase: Which portray is the largest?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q3305213 . ?ent wdt:P2049 ?obj } ORDER BY DESC(?obj)LIMIT 5 
Answer: Companions of Diana, The Death of Nelson, Sorrow, Winged Ox of Saint Luke from Sant Esteve d'Andorra, One of the Family